package com.jy.rhin.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.atomic.AtomicInteger;

@Configuration
@EnableAsync
public class ThreadPoolConfig {

    /**
     * 初始化线程池
     *
     * @return
     */
    @Bean("publishMessageRetryExecutor")
    public Executor publishMessageRetryExecutor() {

        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        // 设置核心线程数
        int corePoolSize = Runtime.getRuntime().availableProcessors();
        executor.setCorePoolSize(corePoolSize);
        // 设置最大线程数
        executor.setMaxPoolSize(2* corePoolSize);
        // 设置队列容量
        executor.setQueueCapacity(1000);
        // 设置线程活跃时间（秒）
        executor.setKeepAliveSeconds(60);
        // 设置拒绝策略
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        // 等待所有任务结束后再关闭线程池
        executor.setWaitForTasksToCompleteOnShutdown(true);
        executor.setThreadFactory(new ThreadFactory() {
            AtomicInteger atomicInteger = new AtomicInteger();
            @Override
            public Thread newThread(Runnable r) {
                Thread thread = new Thread(r);
                // 设置默认线程名称
                thread.setName("publish-message-retry-executor" + atomicInteger.getAndIncrement());
                return thread;
            }
        });
        return executor;
    }
}
